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Finding the Fourth Proportional to 18,697.92, 25,791.52 and 11,139.08

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Solution

The fourth proportional to 18,697.92, 25,791.52 and 11,139.08 is: 15,365.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.92 : 25,791.52 = 11,139.08 : x
  2. Step 2: Convert to fraction form
    18,697.92/25,791.52 = 11,139.08/x
  3. Step 3: Cross multiply
    18,697.92x = 25,791.52 × 11,139.08
  4. Step 4: Simplify right side
    18,697.92x = 287,293,804.60
  5. Step 5: Solve for x
    x = 287,293,804.60/18,697.92
  6. Step 6: Final answer
    x = 15,365.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.